June 2003
Intermediate to advanced
984 pages
25h 13m
English
Content preview from UML™ Bible
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CHAPTER 11
Modeling an Object's Lifecycle in UML 2.0
In This Chapter
- Exploring the change between UML1.4 and UML 2.0 state machines
- Differentiating simple and composite states
- Modeling triggers
- Defining and modeling transition types
- Working with regions – entry and exit, join, junction, choice and history pseudo states
- Defining and modeling submachines
- Defining and modeling protocol state machines
The single greatest change between UML 1.4 and 2.0 state diagrams (apart from the ongoing name changes) is the effort to separate the semantics of the Activity diagram from that of the state machine semantics. In UML 1.4 there was an attempt to treat the Activity diagram as a subset of the state machine semantics. This resulted in a kind of forced fit that limited the features of the Activity diagram and drew attention away from some of the features that could be valuable in a state machine, such as deferred events, the description of the logic of transitions in terms of sending and receiving signals, and making decisions during the transition. UML 2.0 draws a clear distinction between the semantics of the two types of diagrams and remedies many of these artificially imposed limitations.
The expression “state machine” is used with three different meanings in the UML 1.4 and 2.0 specifications. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.